* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.list {
    height: 280px;
    width: 520px;   
    margin: 50px auto;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
}

.list img {
    width: 520px;
    height: 280px;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

.list img.choose {
    display: block;
}

.content {
    position: absolute;
    top: 0;
    left: 0;
    width: 520px;
    height: 279px;
}

/* .content .row {
    height: 93px;
    position: relative;
} */

.content .col {
    width: 104px;
    height: 93px;
    display: inline-block;
    position: absolute;
}

.prev,
.next {
    width: 20px;
    height: 30px;
    color: #fff;
    font-size: 25px;
    margin-top: -15px;
    text-align: center;
    line-height: 30px;
    position: absolute;
    top: 50%;
    background-color: rgba(31, 5, 5);
    visibility: hidden;
}

.prev {
    left: 0;
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
}

/* 绘制箭头 */
.prev .left-arrow {
    position: relative;
}

.prev .left-arrow::before,
.prev .left-arrow::after {
    content: "";
    border: 10px solid transparent;
    position: absolute;
    top: 5px;
    left: -8px;
    border-right-color: rgba(248, 242, 242);
}

.prev .left-arrow::after {
    left: -5px;
    border-right-color: rgb(5, 5, 5);
}

.next {
    right: 0;
    border-top-left-radius: 12px;
    border-bottom-left-radius: 12px;
}

.next .right-arrow {
    position: relative;
}

.next .right-arrow::before,
.next .right-arrow::after {
    content: "";
    border: 10px solid transparent;
    position: absolute;
    top: 5px;
    border-left-color: rgba(248, 242, 242);
}

.next .right-arrow::after {
    right: -7px;
    border-left-color: rgb(5, 5, 5);
}

.btns {
    font-size: 0;
    margin-left: -43px;
    border-radius: 10px;
    padding-left: 6px;
    position: absolute;
    left: 50%;
    bottom: 8px;
    text-align: center;
    background-color: rgba(255,255,255,.3);
}

.btns li {
    display: inline-block;
    padding: 5px;
    margin:3px 6px 3px 0;
    /* margin-right: 6px; */
    border-radius: 50%;
    background-color: #fff;
}

.btns .choose {
    background-color: red;
}